Acompany has net sales of $752,000 and cost of goods sold of $543,000. its net income is $17,530. the company's gross margin and operating expenses, respectively, are:

Net sales/revenue = $752,000
Cost of goods sold (COGS) = $543,000
Net income = $17,530

To find the gross margin you will follow the equation:
gross margin = (revenue-COGS)/revenue 
gross margin = ($752,000-$543,000)/$757,000
gross margin = $209,000/$757,000
gross margin = .276, 27.6%

To find the operating expenses or OER you'll need to divide the companies operating expenses by the operating income.  This will yield in the operating expenses. 

4.
A. 2:12(simplified 1:6)
B. 2:8 (simplified 1:4)

5.
3:12 (simplified 1:4)

I’m pretty sure this is right but I did my best lol sorry